PDF malware analysis — malicious · 452fa1d4a0c8f5f4

MALICIOUS

PDF

4.3 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: f8a62243c74ed4502e26a55b40e41394 SHA-1: 5fd942a72718a36eecfae6a1a2509d02f1804b7f SHA-256: 452fa1d4a0c8f5f4701fba132398e8afd48de60cba0935de5b3b306f547f4c73

358 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The file is a PDF containing multiple JavaScript streams and exploits for CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. The critical heuristics indicate the PDF is designed to execute embedded JavaScript, which in turn is likely used to download and execute a second-stage payload, as suggested by the ClamAV detection of 'Pdf.Dropper.Agent-7255992-0' and the extracted artifact 'Js.Exploit.Shellcode-18'.

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Dropper.Agent-7255992-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7255992-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `14c9ef565e6d76fcb4b4f297b36bba98f96965c763f4174a957f68b04d853f53`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC3E	84 bytes
`javascript_obj0016_001.js` `18edec90117bfb4e6b22486ea597deda879fd5294c3af03648706bb611b9b7f5`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCD7	385 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `a76c8571f0034c288bf835259fc98218caca127ff060dd69eec567cd23bee008`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE28	113 bytes
`legacy_pdfkit_stage_000.js` `9eb7aefba91f09524c2ad385fe4834ea0fec3ccd69f08a1862f5660a69d3606c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6477 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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